Artificial asphalt and method of making a stable mixture thereof with stony material



Patented @ct. 24 1922.

UNHT tiers 31,433,133? PATENT @FFHQE.

HERMANN KAMBACH, OF BERLIN-CHARLOTTENBURG, GERMANY.

ARTIFICIAL ASPHALT AND METHOD OF MAKING A STABLE MIXTURE THEREOF WITH STONY MATERIAL.

No Drawing.

T 0 all whom it may concern -Be it known that I, HERMANN KAMBAoma citizen of the German Empire, residing at Berlin-Charlottenburg, Germany, have invented certain new and useful Improveinents in Artificial Asphalt and Methods of Makin a Stable Mixture Thereof with Stony lllaterial, of which the following is a specification.

compressed asphalt has up till now been made use of in many instances in road making, for pavements, side walks-and the like. The foreign asphalt imported as a rule from Sicily has u till now formed the only rawmaterial, w ich has not been replaced by others.

The novel product according to the present invention, being made of raw-materials obtainable in every coal-producing country and equalling the asphalt imported from abroad as far as road making and the like are concerned offers the great advantage of rendering the national industry independent from foreign countries, the more so as the price of the novel lower than that of oilian asphalt.

The novel mass essentially consists of coal tar itch and tar, anthracene oil being adde if necessary, and a vegetable oil such as linseed oil, or. a plurality of liquid oils such as a mixture of linseed oil and rape seed oil.

The difference between the freezing point and melting point of a bitumen-like mass composed for instance of 5 parts by! weight w Application filed May 26,

garoduct is considerably- 1921. Serial No. 472,923.

a ainst the action of cold and heat, thus 0 ering a most perfect substitute for Sicilian asphalt.

Old broken natural asphalt is revived by anaddition of one or two per cent of my novel mass to such an extent as to be at least equal to fresh asphalt.

In order to obtain artificial compressed as phalt according to the present invention I may for instance proceed as follows: To a mixture of 5 parts linseed oil, 5 parts rape seed oil, 70 parts coal tar pitch, 15 parts anthracene oil and 15 parts coal tar there are added for instance 1000 parts stone meal or the like. This mixture is heated to about 17 017 5 C. and can then be compressed. Its specific weight is 2z2-2 :3. The compressed mass is absolutely impervious to water and also water proof. It will ,resist the highest pressure occurring in road traific.

By heating the bitumen-like mass described in the first instance with the stony materials mentioned above to about 100 C. a stable asphalt mass is obtained which may be kept in store for subsequent use and need only be heated to about 170 C. (preferably by aid of steam) and then be compressed.

I claim:

1. As a novel product for making compressed paving material and for regenerating broken natural asphalt, a mixture of coal tar pitch, coal tar, anthracene oil and a vegetable oil.

As a novel product for making compressed paving material and for regeneratmg broken natural asphalt, a mixture of coal tar pitch, coal tar, anthracene oil and vegetable oils of different kinds.

3. As a novel product for making compressed paving material, a mixture of coal tar itch, coal tar, anthracene oil and a vegetab e oil with finely comminuted stony material. v

4. As a novel product for making compressed paving material, a mixture of coal tar pitch, coal tar, anthracene oil and vegetable oils of diiferent kinds with finely comminuted stony material.

5. As a novel product, a mixture comprising 70 parts coal tar pitch, 15 parts anthracene 011, 15 parts coal tar and 10 parts linseed oil.

6. As a novel product, a mixture comprisabout ing 70 Farts coal tar pitch, 15 arts anthra-v cene oi, 15 parts coal tar an 5 parts lin seed oil and 5 parts rape seed oil.

7. As a novel product, a mixture comprising 70 parts coal tar pitch, 15 parts coal tar, 15 parts anthracene oil, parts linseed oil and about 1000 parts of finely comminuted stony material.

8. As a novel product, a mixture comprising 70 parts coal tar pitch, parts coal tar, 15 parts anthracene oil, 5 parts linseed oil, 5 parts rape seed oil and about 1000 parts of finely comminuted stony material.

9. The method which consists in heating coal tar pitch, coal tar, anthracene oil and a 15 vegetable oil with finel comminuted stony material to about 100 10. The method which consists in heatin coal tar pitch, coal tar, anthracene oil an Vegetableoils of diflerent kinds with finely comminuted stony material to about C'.

- In testimony whereof I affix my signature.

HERMANN KAMBACH. Witnesses:

PAUL FISCHER, HANS VON NIOKENV 

